Stephen P. McGrew

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Anticounterfeiting method and device

Printed matter – Having revealable concealed information – fraud preventer or... – Utilizing electromagnetic radiation
Patent

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Anticounterfeiting method and device utilizing holograms and pse

Cryptography – By modifying optical image
Patent

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Counter-flow heat pump

Refrigeration – Using electrical or magnetic effect – Thermoelectric; e.g. – peltier effect
Reexamination Certificate

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Diffractive color and texture effects for the graphic arts

Patent

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Diffractive color and texture effects for the graphic arts

Patent

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Profile ID: LFUS-PAI-P-13151

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